German Chancellor Angela Merkel with Prof Peter Bofinger (second left) at a presentation of a report by Germany’s “five wise men” who advise the federal government on economic affairs. Also pictured is Sigmar Gabriel (left), vice-chancellor and minister for economic affairs, and the chairman of the German Council of Economic Experts Christoph M Schmidt (right). Photograph: John MacDougall/AFP/Getty Images

Life in Germany can be lonely if you’re Peter Bofinger. To paraphrase Little Britain, he’s the only Keynesian in the village.The 50-year-old economist(...)